Hiram field



HIRAM FIELD, OF SMITI-IVILLE, CANADA, ASSIGNOR OF ONE-HALF TO GEO. D. WYOKOFF, OF WVASHINGTON, DISTRICT OF COLUMBIA.

PUMP.

SPECIFICATION forming part of Letters Patent No. 513,966, dated January 30, 1894.

' Application filed June 25, 1892- Serial No. 433,005- (No model.)

To all whom it may concern:

Be it known that I, HIRAM FIELD, a citizen of the United States, residing at Smithville, 1n the Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Pumps; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

It is the object of my invention to provide a suction andforce pump of improved construction combining the advantages of simplicity and, cheapness in the forms and connections of its parts, ease of operation, and capacity for throwing a stream of liquid with considerable force. Itis therefore well adapted for use as a sprayingpump for destroying insects upon fruit trees or plants. Furthermore the only parts which are liable to deterioration, namely the valves and valve seats,

are so constructed that they may be readily renewed by material and tools at the command of a farmer or any other person without expense and with little labor.

With such objects in view my invention consists in the parts and combinations thereof hereinafter particularly set forth and claimed.

In order to make my improvements more clearly understood I have shown in the accompanying drawings means for carrying the same into practical effect, without however limiting the invention in its useful applications to the particular construction which, for the sake of illustration, I have delineated.

In said drawings-Figure 1 is a front elevation of a pump embodying my improvements. Fig. 2 is a vertical sectional view of the same on line 1-1, Fig. 1. Figs. 3 and 4 are detail sectional views on a'larger scale illustrating the construction, and mode of combining with the pump, of the valves and valve seats.

Referring to the drawings 1 indicates abase preferably of cast iron which is secured iii any suitable manner to the platform of a well, or to the head of a barrel or other vessel containing liquid which it is desired to force or spray by the pump. The said base is provided on its upper side with a recess 2 into which opens from below a screw-threaded aperture 3 in which is adapted to be screwed the suction pipe 4 of any desired length extending down into the well or other reservoir.

5 is the lower pump barrel preferably formed of cast iron and having lugs 6 by means of which, and by bolts 7, the barrel is mounted securely upon the base.

8 is the upper barrel preferably cast with the lower barrel and united integrally therewith by outwardly and vertically extending brackets 9.

10 is the spout or delivery pipe of the pump situated about midway of the height of the upper barrel. The upper part of this barrel is entirely closed above said spout and forms an air chamber which permits the accumulation in the upper barrel, under pressure, of the liquid to be forced.

On the top of the barrel 8 are formed lugs 11 in which is pivoted a handle 12 constituting a lever of the first order to the short arm of which is pivoted a rod 13 extending downward to the space between the upper and lower barrels.

The upper barrel from which the liquid is forced is preferably of considerably less area in cross-sectionsay one half-than that of the lower'barrel, thereby enabling as much liquid to be forced into the upper barrel and from the delivery spout upon the down stroke of the pistons as upon their up stroke.

The upper and lower pistons are shown at 14 and 15 respectively and said pistons are formed or united together. The upper piston being of a less diameter there is formed a shoulder 16 at the plane on which they are joined together. A short distance above this plane pivot'pins 17 are fixed in the opposite sides of the piston 14. Between said shoulder and pins are held the hooks 18 of a yoke 19 on the outer end of which is formed a vertical sleeve 20 surrounding the rod 13 and clamped thereto by a set screw 21. This yoke maybe attached and detached, before the insertion or after the rem oval of the rod 13, by turning the bracket upward until the extremities of its hooks are on a level with the bottoms of the pins 17 and then removing the hooks horizontally out from under the pins, as indicated in dotted lines in Fig. 1.

In order to avoid the necessity for boring out or smoothly finishing the pump barrels, and nevertheless obtain such a tight fit of the pistons as is necessary for realizing the full force of the pump and for preventing the escape of liquid, I make the barrels of slightly greater diameter than the pistons and provide at the upper end of the lower barrel and lower end of the upper barrel packing boxes 22, 23 adapted to hold packings 24, 25 of leather or any suitable fibrous or other material in close contact with the pistons. Said boxes are in the form of flanged rings having lugs 26 situated in line with the horizontal outwardly extending parts 27 of the brackets 9. These lugs are slotted and the bracket portions are perforated, and the boxes are clamped against the ends of the barrels by bolts 28 passing through said slots and perforations.

I will now describe the mode of mounting the pump Valves so that they may be easily put in place and simply and inexpensively repaired or renewed. The pistons already referred to are hollow or tubular from end to end, permitting the free upward passage of the liquid through them from the lower to the upper barrel on their down stroke. On the up stroke the return of the liquid is prevented and it is carried with the pistons by the piston valve 29. This valve consists of a disk of leather tacked at its middle to the under side of a cylinder or block 30 of wood, which gives a little weight and stiitness to the valve, and at one edge tacked to the upper end of a tubular sleeve 31 of wood which forms the valve seat. The latter is driven as a plug into the hollow center of the piston tube, for inst-anceinto the lower end of the lower piston.

The pump barrel valve is shown at 32. It has a rigid block 33 of wood on its upper side and is united by its edge to a perforated block or plate 34 of wood which forms the valve seat. This plate is fitted in the recess 2 of the base 1 and is clamped in place by the bolts 7 which force down upon it the bottom edge of the barrel 5. A packing ring 35 is situated beneath said edge of the barrel and covers and makes watertight the joint between the edge of the plate 34 and the base 1.

It will be seen that any or all of the parts 29, 30, 31, 32, 33 and 34, which are the only parts of the pump subjected in any practical degree to deterioration (excepting the packings 24 and 25), may be readily replaced without the employment of a skilled workman and without requiring any castings or other parts to be procured from the manufacturers of the pump.

The mode of operation of the pump has been sufticiently set forth in the foregoing description of its construction and the connections of its parts.

What I claim is- 1. In a double acting pump, the combination of two barrels of different areas 1n cross section parallel with each other and having open ends opposed to each other, the double tubular piston having its two ends of correspondingly ditferent transverse areas and within the open ends of the barrels, a check valve preventing the return of water from the larger barrel, a check valve carried by the piston, and means for reciprocating the said piston consisting of the actuating rod 13, the laterally extending yoke rigidly connected with said rod and pivoted to the piston on diametrically opposite sides of the same, and means for reciprocating said rod, substantially as set forth.

2. The combination with the pump barrels, the double piston and the actuating rod 13, of the laterally extending yoke rigidly connected with said rod and pivoted to the piston on diametrically opposite sides of the same, substantially as set forth.

3. The combination with the pump barrels, the double piston, and the actuating rod, of the laterally extending yoke 19 having a sleeve or bearing 20 for said rod, a clamping device rigidly connecting said rod and yoke when relatively adjusted, and a pivotal connection between said yoke and piston, sub stantially as set forth.

4. The combination with the pump barrels and the piston tube having a shoulder 16 and pivot pin 17, of the yoke 19 having hooks engaged between said pins and shoulder, and the pump rod connected rigidly and adjustably with said yoke, substantially as set forth.

Signed at Smithville, in the county of Lincoln, Canada, this 13th day of June, 1892.

HIRAM FIELD.

In presence of J ABEZ P. COOPER, Lnwrs RUHL. 

